Perhaps you should try some spelling variations:
communication barriers » communication series, communication disorders
technologies model » technological model, technologies modelling, technological models
model formulation » model simulation, budget formulation, model simulations
de developpement » sme development
formulation one » formulation over, formulation de, formulation model
developpement l » developpement il, developpement la, developpement de
barriers de » barriers d, barriere der, barriers key
l afrique » en afrique

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: technologies model formulation one does _ communication barriers de developpement l afrique.*.